[brief expletive at end, intentionally left intact]
You state that, having not taken my class, it would be impossible to know our policy of not allowing people to walk in an hour late. Most risk analysis offers that in the face of substantial uncertainty, you opt for the more conservative path or hedge your bet (e.g., do not show up an hour late until you know the professor has an explicit policy for tolerating disrespectful behavior, check with the TA before class, etc.). I hope the lottery winner that is your recently crowned Monday evening Professor is teaching Judgement and Decision Making or Critical Thinking.
In addition, your logic effectively means you cannot be held accountable for any code of conduct before taking a class. For the record, we also have no stated policy against bursting into show tunes in the middle of class, urinating on desks or taking that revolutionary hair removal system for a spin. However, xxxx, there is a baseline level of decorum (i.e., manners) that we expect of grown men and women who the admissions department have deemed tomorrow's business leaders.
xxxx, let me be more serious for a moment. I do not know you, will not know you and have no real affinity or animosity for you. You are an anonymous student who is now regretting the send button on his laptop. It's with this context I hope you register pause...REAL pause xxxx and take to heart what I am about to tell you:
xxxx, get your shit together.
Amen, Brother Galloway! I should make this required reading in my next Syllabus/FAQ.